diff options
| -rw-r--r-- | CMakeLists.txt | 91 |
1 files changed, 73 insertions, 18 deletions
diff --git a/CMakeLists.txt b/CMakeLists.txt index 537da41..2fa2a3f 100644 --- a/CMakeLists.txt +++ b/CMakeLists.txt @@ -32,6 +32,8 @@ option(ENABLE_SHARED ) include(CheckIncludeFile) +include(CheckSymbolExists) +include(CMakePushCheckState) add_definitions(-DFFTS_CMAKE_GENERATED) @@ -62,19 +64,78 @@ if(HAVE_UNISTD_H) add_definitions(-DHAVE_UNISTD_H) endif(HAVE_UNISTD_H) -# check if the platform has support for SSE SIMD extension -check_include_file(xmmintrin.h HAVE_XMMINTRIN_H) -if(HAVE_XMMINTRIN_H) - add_definitions(-DHAVE_SSE) -else() - # check if the platform has support NEON SIMD extension - check_include_file(arm_neon.h HAVE_ARM_NEON_H) - if(HAVE_ARM_NEON_H) - add_definitions(-DHAVE_NEON) +# Determinate if we are cross-compiling +if(NOT CMAKE_CROSSCOMPILING) + if(CMAKE_SYSTEM_PROCESSOR MATCHES "^arm") + # Determinate what floating-point hardware + # (or hardware emulation) is available + # + # Test compilation with -mfpu=neon + cmake_push_check_state() + set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -mfpu=neon") + check_symbol_exists(exit stdlib.h NEON_AVAILABLE) + if(NOT NEON_AVAILABLE) + cmake_reset_check_state() + + # Test compilation with -mfpu=vfp + set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -mfpu=vfp") + check_symbol_exists(exit stdlib.h VFP_AVAILABLE) + if(NOT VFP_AVAILABLE) + message(WARNING "FFTS is using 'soft' FPU") + else() + message("FFTS is using 'vfp' FPU") + set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -mfpu=vfp") + + set(ENABLE_NEON 0) + set(ENABLE_VFP 1) + endif(NOT SOFTFP_AVAILABLE) + else() + message("FFTS is using 'neon' FPU") + set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -mfpu=neon") + + set(ENABLE_NEON 1) + set(ENABLE_VFP 0) + endif(NOT NEON_AVAILABLE) + + # Determinate float ABI if NEON or VFP is used + if(NEON_AVAILABLE OR VFP_AVAILABLE) + cmake_push_check_state() + + # Test compilation with -mfloat-abi=hard + set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -mfloat-abi=hardfp") + check_symbol_exists(exit stdlib.h HARDFP_AVAILABLE) + if(NOT HARDFP_AVAILABLE) + cmake_reset_check_state() + + # Test compilation with -mfloat-abi=hard + set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -mfloat-abi=softfp") + check_symbol_exists(exit stdlib.h SOFTFP_AVAILABLE) + if(NOT SOFTFP_AVAILABLE) + # Most likely development libraries are missing + message(WARNING "FFTS is using 'soft' float ABI") + else() + message("FFTS is using 'softfp' float ABI") + set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -mfloat-abi=softfp") + endif(NOT SOFTFP_AVAILABLE) + else() + message(WARNING "FFTS is using 'hard' float ABI") + set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -mfloat-abi=hard") + endif(NOT HARDFP_AVAILABLE) + + cmake_pop_check_state() + endif(NEON_AVAILABLE OR VFP_AVAILABLE) + + cmake_pop_check_state() else() - add_definitions(-DHAVE_VFP) - endif(HAVE_ARM_NEON_H) -endif(HAVE_XMMINTRIN_H) + # check if the platform has support for SSE SIMD extension + check_include_file(xmmintrin.h HAVE_XMMINTRIN_H) + if(HAVE_XMMINTRIN_H) + add_definitions(-DHAVE_SSE) + endif(HAVE_XMMINTRIN_H) + endif(CMAKE_SYSTEM_PROCESSOR MATCHES "^arm") +else() + # Check if we can always use detection code above? +endif(NOT CMAKE_CROSSCOMPILING) # compiler settings if(MSVC) @@ -138,9 +199,6 @@ if(ENABLE_NEON) ) endif(DISABLE_DYNAMIC_CODE) - set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -mfpu=neon") - set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -mfloat-abi=softfp") - add_definitions(-DHAVE_NEON) elseif(ENABLE_VFP) if(NOT DISABLE_DYNAMIC_CODE) @@ -149,9 +207,6 @@ elseif(ENABLE_VFP) ) endif(NOT DISABLE_DYNAMIC_CODE) - set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -mfpu=vfp") - set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -mfloat-abi=softfp") - add_definitions(-DHAVE_VFP) elseif(HAVE_XMMINTRIN_H) add_definitions(-DHAVE_SSE) |
